﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Bai07_Sharp
{
    class Program
    {
        static void Main()
        {
            IA a = new C();
            a.m1();
            B b = new C();
            b.m2();
        }
    }
}
